Telephone apparatus.



0. M. GLUNT 6; B. G. G. MUELLER.

TELEPHONE APPARATUS.

APPLICATION FILED AUG.27. 1013.

Patented Dec. 8, 1914.

l/l/f/nesses:

UNITED s'ra'rus PATENT OFFICE.

oMEB M. GLUNT, or nurrnnnronn, am Em t-c. q. MUELLER, or ELIZABETH, NEWJnnsn'r, Assmnons To wnsrnnn nnncrarc comranr, on NEW YORK, N. Y., A

GQMQBATION F ILL N S.

TELEPHONE APPARATUS.

Medus Specification of Letters l'atent.

Patented Dec. 8, 19114.

Application filed August 27, 1813. Serial No. 786,857.

To all whomz't may concern:

Be it known that we, OMER M. GLUNT and EMIL C. G. MUELLER, citizens ofthe.

United States, residing, respectively, at Rutherford, in the county ofBergen and State of New Jersey, and at ElIZiLbGth, 1n the county ofUnion and State of New Jersey, have invented certain new and usefulmitters, and more particularly to that type of transmitter which isadapted to be held in the hand of the user. While transmitters of thistype may be used wherever a portable transmitter is desirable, thetransmitter hereinafter disclosed is particularly adapted for use intelephone systems mstalled in vehicles to enable the "occupant of thevehicle to communicate with the driver thereof. In systems of thischaracter, when installed for instance in an automobile of the limousinetype, a. receiver located at or near the chaufieurs seat and a handtransmitter located in the tonneau are connected. in series with abattery. As the system is in use only a small part of the time, thebattery is normally disconnected from the circuit and a switchconveniently located in the handle of the transmitter 18 provided inorder to connect the battery to all till

the circuit while the system is in use.

The invention will be more fully understood by referring to theaccompanymg drawing, wherein- Figure 1 is a lon 'tudinal sectional viewof the transmitter o the invention taken on the line 1-1 of Fig. 2; Fig.2 is a similar sectional view taken on the line 2-2 of Fig. 1; and Fig.3 is a perspective view showing various details in the position whlchthey occupy before assembling.

To a circular plate 1, which forms the mouth-piece of the transmitter, acasing 2 is attached, said plate and casing forming a cylindrical boxwithin which the usual diaphragm 3, the carbon button 4 and bridge 5 aremounted. The bridge 5 is attached to the plate 1 by means of a pluralityof screws 6 so that by removing the plate 1 access may be. had foradjusting purposes to the carbon button 4:, which is carried thereby.

Secured to the casing 2 by means of rivets 7 is a metal tube 8, whichregisters with an aperture 9 in the casing. A second metal tube 10 isprovided with two integral fingers 11, which are provided with apertures12 near their upper extremities. The fingers 11 are inserted within thetube 8, and a pin 13 is passed through suitable apertures in the tube 8and the apertures 12 to secure the tubes 8 and 10 in fixed relation. Atubular handle 14, which maybe of wood, hard rubber or other suitableinsulating material, surrounds the tube 10 in such a manner that areduced portion 16 of the handle fits in between the tubes 8 and 10 withthe lower end of the tube 8 resting on a shoulder 15. the lower end ofthe tube 10 and serves to secure the handle portion 14 to such tube.

The tubes 8 and 10 provide a conduit for the reception of. a pair ofconductors 18 which are connected to suitable terminals carried by thebridge 5, and a knot 19 in the conductors 18 serves in connection withthe nut 17 to prevent the conductors from being pulled out of thehandle. Also carried by the bridge 5 are two angular contact s rings 20and 21 which are normally out 0 contact and are adapted to be placed incontact, to close the circuit of the transmitter, by means of pivotedswitch lever 22. The switch lever 22, which is formed of sheet metal,carries at its upper end a contact piece 23 of insulating material andat its lower end a finger piece 26 also of insulating material, and atthe central portion thereof are a pair of integral ears 24, each ofwhich is provided with an aperture 25. When in assembled positiontheswitch lever 22 is located within the tube 8, and is pivoted thereinby means of the pin 13 which passes through the apertures 25. When inthis position the contact springs 21 resses against the contact piece23, can rie by the upper end of the lever 22, and causes the fingerpiece 26 to project through an aperture 2 in the tube 8.

When the transmitter is in use the speaker grasps the handle 14 anddepresses the finger piece 26 with the thumb, thus closing the contacts20 and 21 and placing battery on the system. Owing to the fact that thespeech transmitting elements and the contact springs are all mounted onthe plate and the handle and switch lever are se- An annular nut 17 isthreaded into- We claim: I

1. A hand telephone transmitter comprising a casing havin a tubularhandle secured thereto, a brldge piece mounted in said casing, atransmitter element and cir cuit controlling elements carried by saidbridge pieces, and a switch operating member mounted in said handle andcoiiperating with said circuit controlling elements;

2. A hand telephone transmitter comprising a cylindrical casing having atubular "handle secured thereto, a bridge piece mounted transversely ofsaid casing, a

transmitter element and a pair of contact springs carried by said'bridgepiece, and a contact closing member mounted in said tubular handle withone end engaging said contact springs and the other end extend- 'ingthrough an opening in said handle.

niaopae 3. A hand telephone transmitter comprising a casing having atransmitter element and a switch mounted therein, a tubular extension onsaid casing, a tubular member having one end fitted in said tubularextension, an insulating handle surrounding said tubular member, aswitch-operating 'lever in said tubular member, and a pivot pin for saidlever serving also to secure-said tubular member to said tubularextension.

45. A hand telephone device comprising a cylindrical casing having atelephonic element and a switch therein, a tubular extension on saidcasing, a tubular member having a pair of upwardly extending fingersadapted to fit within said tubular extension, a switch-operating leverin said tubular member, and a pivotpin for said lever passed throughapertures 1n said tubfi lar extension and said fingers to secure saidtubular member to said tubular extension.

In witness whereof, we hereunto subscribe our names this th day ofAugust A. 31).,

()MER M. GLUNT. EMIL C. G.- MUELLER. Witnesses:

0). D. M. Grimm, W. F, HOWEKAN

